/*
 * Copyright (c) 2008, Oracle and/or its affiliates. All rights reserved.
 * ORACLE PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
 *
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 *
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 */

package javax.swing.colorchooser;

import java.awt.Component;
import javax.swing.UIManager;

class ColorModel {

  private final String prefix;
  private final String[] labels;

  ColorModel(String name, String... labels) {
    this.prefix = "ColorChooser." + name; // NON-NLS: default prefix
    this.labels = labels;
  }

  ColorModel() {
    this("rgb", "Red", "Green", "Blue", "Alpha"); // NON-NLS: components
  }

  void setColor(int color, float[] model) {
    model[0] = normalize(color >> 16);
    model[1] = normalize(color >> 8);
    model[2] = normalize(color);
    model[3] = normalize(color >> 24);
  }

  int getColor(float[] model) {
    return to8bit(model[2]) | (to8bit(model[1]) << 8) | (to8bit(model[0]) << 16) | (to8bit(model[3])
        << 24);
  }

  int getCount() {
    return this.labels.length;
  }

  int getMinimum(int index) {
    return 0;
  }

  int getMaximum(int index) {
    return 255;
  }

  float getDefault(int index) {
    return 0.0f;
  }

  final String getLabel(Component component, int index) {
    return getText(component, this.labels[index]);
  }

  private static float normalize(int value) {
    return (float) (value & 0xFF) / 255.0f;
  }

  private static int to8bit(float value) {
    return (int) (255.0f * value);
  }

  final String getText(Component component, String suffix) {
    return UIManager.getString(this.prefix + suffix + "Text",
        component.getLocale()); // NON-NLS: default postfix
  }

  final int getInteger(Component component, String suffix) {
    Object value = UIManager.get(this.prefix + suffix, component.getLocale());
    if (value instanceof Integer) {
      return (Integer) value;
    }
    if (value instanceof String) {
      try {
        return Integer.parseInt((String) value);
      } catch (NumberFormatException exception) {
      }
    }
    return -1;
  }
}
